[urgent] Plesk 10.3.0 running postfix. dovecot problem

[Maku]

My Plesk installation was running on postfix mailserver before.

I installed dovecot thru the instructions I got from here

http://www.howtoforge.com/perfect-server-centos-5.6-x86_64-ispconfig-2-p5

After the installation and setup. I tried logging in the webmail but it says login failed.

Help this is really urgent

edit :

Btw, I am running on dovecot 1.0.7 right now if you have any ideas on how to do it. I can't find a dovecot-sieve plugin compatible with it

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I tried this tutorial to no avail.
http://debianforum.de/forum/viewtopic.php?f=8&t=125205

Please help

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I upgraded to dovecot 1.2 and dovecot-sieve 1.19 still with errors like this. Authentication failed

 

[IgorG]

Hmmm. As far as I remember, dovecot is not supported by Plesk.